JJG 625-2001 Verification Procedure for Abbe Refractometer JJG625-2001 Standard download decompression password: www.bzxz.net
This procedure is applicable to the initial verification, subsequent verification and in-use inspection of Abbe refractometer.

National Metrology Verification Standard of the People's Republic of China..IG625—2001
Abbe Refractometer
Ahbc Refractoncter
200106-05
Implementation on 2001—10-01
Promulgated by the General Administration of Quality Supervision, Inspection and Quarantine.J.IG625—2001
Verification Procedure for Abbe Refractometer
Verification Procedure for Ahhe Refractometer
JJG 625—24H01
Replaced with JJG625—1989
This standard was approved by the General Administration of Quality Supervision, Inspection and Quarantine on June 5, 2001 and implemented on October 1, 2001.
Responsible unit: National Optical Metrology Technical Committee Drafting unit: China Material Science Research Institute This regulation is entrusted to the National Optical Metrology Technical Committee as the main drafter of this regulation!
Liu Wenli
Jiang Shifeng
Ma Zhenye
JJG625—2001
(China Institute of Metrology)
(China Institute of Metrology)
(China Institute of Metrology)
Overview·
Metering performance requirements
3.1 Working block:
JJG 625—2001
Refractive index measurement variation caused by rigid prisms: 3.3 Refractive index measurement indication error 2·
3.4 ​​Repeatability of reflectivity measurement…
3.5 Minimum error of average color measurement
General technical requirements
Appearance·
Optical system
Measurement instrument control
Verification conditions:
Verification examples
Verification methods
Explanation of verification results
Verification period·
Record A1. Sample quick test method
Appendix B Abbe refractometer verification record Record format
Appendix Abbe refractometer calibration certificate (back) format Appendix L Refractometer control uncertainty analysis record
1 Specification
JJC.25—200.
Abbe refractometer calibration procedure
Technical specification Applicable to Abbe refractometer: When the first setting is made, the first setting is made: Then use the original inspection 2
The Abbe refractometer can be used to measure the refractive index () and the average refractive index (\) of the liquid or the surrounding body through the instrument: 1 From the refractometer, the test piece is repaired
As shown in the figure, the test file is placed in the induction heater! , the old liquid between the two scans is very thin, the refractive index of the sample under test is measured by the refractive index of the mirror, and the refractive index is less than the refractive index of the sample under test. When the refractive index is less than the critical reflection angle, it enters the refractive mirror, but still emits the new reflection angle from the discharge. The relationship between the new reflection index and the measured sample is as follows: n=xiro(u-igp2
In the formula: - the refractive index of the refractive mirror is called the pre-refraction angle
! The refractive index method uses a straight line to draw a dispersion mirror (called Mi Xiao's sharp edge). Under the self-illumination, the sample is measured by gently rotating the mirror to eliminate the nuclear refraction. The free dispersion of Ling Wen produced cattle: make the muscle separation line at the position of the blood elimination model clean and refract the same light, the leaf time measurement D port velvet's emitted distance: according to the time of the interval cultivation boundary line elimination dispersion time, the dispersion cooking degree and the reading teaching art road and the new mature slaughtering position of the measurement, in the instrument left the male book after the color whole mountain, find out the tree should be effective road A and, count the average color age of the tested pen, n--A
can be divided into standard Ge and whole display through different number methods (2)
3 metrological performance requirements
3.1 working sample
JJG 625- 2001
The instrument should be equipped with a working sample, which must be calibrated by a meter. The measurement expanded uncertainty of its refractive index (n) should not exceed -(-)
3.2 The refractive index measurement variation caused by the chromatic aberration is based on the refractive index measurement variation of the same object measured at different achromatic positions caused by the chromatic aberration. The maximum refractive index measurement variation should not exceed 210*13.3 Refractive index measurement indication error
Refractive index (\) indication error Should not exceed ±3×10. 3.4 Refractive index measurement repeatability
Refractive index measurement repeatability is characterized by experimental standards, and its value should not exceed 1.5×10-*, 3.5 Average chromatic aberration measurement indication error
Almost uniform chromatic aberration () measurement indication error should not exceed the above 51044 General technical requirements
4.1 External specifications
4.1.1 The instrument should not have any peeling of the inlay layer and obvious color unevenness 4.1.2 The transmission part of the instrument should be flexible and stable, without jamming or loosening 4.1 .3 Optical parts should be clean and the glue should be good; the numbers and scales on the reading part should be clear and complete. 4.1.4 The instrument should have a nameplate clearly indicating the name, model, specification, serial number, date of manufacture and name of the instrument. 4.1.5 The instrument must be equipped with a working block and a dispersion meter. 4.2 Optical system 4.2.1 The gap between the light-entering prism and the deflecting mirror should be able to ensure that the measured liquid has an appropriate thickness. 4.2.2 The optical system should have a clear image and no color difference within the field of view. The boundary line should be clear. There should be no obvious parallax between the clear and 1-line cross lines, and the reticle plate should not have obvious deflection: the parallax between the reticle and the index line of the reading system should not exceed 12 of the scale line width:
5 Control of measuring instruments
Control of measuring instruments includes the first calibration, subsequent calibration and inspection during use: 5.1 Calibration conditions
3.1.1 Calibration equipment
5.1.1.1 Abbe refractometer blocks (hereinafter referred to as standard blocks) are composed of four standard blocks, with the brands K1, K9, F2, and ZI2. The expanded uncertainty of the refractive index (n5) of the standard block is ×10-5 (&=3), and the expanded uncertainty of the average dispersion (rRc) is 7×10-5 (±-3).
5.1.1.2 Distilled water
5.1.1.3 Sodium lamp: 40W incandescent lamp
S.1,1.4 Refractive liquid
JHG625—2001
Three kinds of refractive liquids, their refractive index (n5) are shown in Table 1. Table 1
New refractive liquid name
Water
a-Methane
Note: α-Methyl iodide is drinkable, methyl iodide is volatile, and can be used for a long time. 5.1.2 Environment
5.1.2.1 Temperature: (20±3)℃
The calibration equipment and the instrument to be tested shall be placed at a constant temperature for 2h before calibration: 5.1.2.2 Humidity: 85%
5.2 Verification Items
For verification items, see reference 2. Verification Items Departmental Verification
Working Sample
New Pre-rate Quantity Change Quantity Radiation Rate Measurement Indication Error
Radiation Rate Measurement Accuracy Average Dispersion Source Quantity Indication Error
First Verification
Final Verification
Note: the verification result shall be confirmed by “indicating”, and those that do not need verification shall be “indicating”. 5.3 Verification method
5.3.1 External inspection
Read the standard
QKI, KS
Use the combination of internal inspection and daily inspection, and check the contents specified in 4.1.1--4.1.5.3
S.3.2 And learn the system inspection
JJG625·2mM
Write the hot water to the new mirror: the light is slightly labored, and the mirror wheel is rotated to make the image boundary line obvious to the maximum degree: according to 4.2.1 and 4..27 visual rate: 5.3.3 Working column sample
Working column sample inspection method sign factory Appendix A, the result is in accordance with 5. 1.5.3.4.1.2.3.4.1.4.1.5.3.4.2.5.1.5.3.4.1.5.3.4.1.5.5.3.4.1.5.5.5.6.1.6.1.7.3.8.1.8.1.9.2.10.3.10.3.11.3.12.3.13.3.14.3.15.3.16.3.17.3.18.3.19.4.10.5.10.6.11.6.12.3.13.3.14.3.15.3.16.3.17.3.18.3.19.4.10.5.10.6.11.6.12.3.13.3.14.3.15.3.16.3.17.3.18.3.19.4.10.5.10.6.11.6.12.3.13.3.14.3.15.3.16.3.17.3.18.3.19.4.10.5.10.6.11.6.12.3.13.3.19.4.10.6.11.6.12.3.13.3.14.3.15.3.16.3.17.3.18.3.19.4.10.3.15.3.6 The measurement error of the refraction rate (m) is www.bzxz.net
high light illumination, four kinds of refracting liquids are used, and two people are respectively measured: one for each standard, one for each color elimination position, and one for each color elimination position. The refraction rate reading is taken three times, and the measured value of the refraction rate is obtained by taking the average value, which is the measured value of the standard (, and the difference between the measured value and the standard value is printed as Liu The minimum flicker of the refraction block is called the standard fast. The measured direct medical error meets the requirements of Article 3.3. 5.3. The attenuation amplitude of the vehicle is calculated according to the actual inspection table 3 of the 4 standards. The band should meet the requirements of Article 3.4. E(n-nj) s, (n)-1 (-1-8): the average of the measured values. Half-time (·) measurement of the minimum value of the measurement (1~8.:1~4) illumination period, with + and + and period refraction liquid, separate the measurement. Select and store two color-eliminating devices each for one measurement, and repeat the measurement until the measurement is completed. 8. Avoid reading 2 dispersion measurements, that is, the average value of 7 measurements, etc. According to the detection accuracy () and the three measurement values, the instrument is used in the future. The corresponding values ​​are calculated. The average color value (\1) of the measured value is the sum of the average dispersion value of the standard block and the standard block, which is the average color indication of the selected block. The average indication error of the 4 standard blocks should meet the requirements of Article 3.5. 5.4 Treatment of calibration results: Instruments that pass the calibration will be issued with a calibration certificate: Draw out the uncertainty of the calibration results (which can be analyzed according to the small uncertainty analysis method given in the following). Those that fail the calibration will be issued with a calibration result pass. Notice, and indicate the unqualified items,
5.5 Verification cycle
The inspection cycle of the instrument is generally not more than 1 year: 5
Appendix A
A.1 Verification equipment
AII radiometer
HG625—2001
Working sample block verification method
The uncertainty of refractive index () measurement is better than 5×10(-3). A,1.2 Light source
Sodium lamp and D spectral line filter.
A.1.3 Topography
Salicylic acid methyl tyrant:
A.2 Verification environment
A.2.1 Temperature: (20±1)
Put the verification equipment and the working sample block under inspection in a constant temperature room for 4 hours before reverse verification. A.2.2 Contrast ratio: 85%
A.3 Verification method
A.3.1: Select the V-shaped prism and its base of brand K5 (or K5), adjust the V-shaped refractometer to the use state, and measure the zero point compensation value.
A.3.2: Clean the glass surface of the V-shaped calibration mirror base and the T-shaped sample measuring surface with water, alcohol, and ethyl alcohol mixed waves, put the working sample block on the V-shaped lens base, and drop a suitable amount of methyl salicylate refraction liquid. A.3.3 Use a light lamp and a T) spectral filter to illuminate, measure 3 times and take the average value, add the zero point correction value, and calculate the refractive index of the working sample block\m:
) Indicator table
JJG 625—2001
Some ministers
You! Position
JK:025—-2001
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